Heavy duty storage hook



FIG. 1 is a perspective view of a heavy duty storage hook;

FIG. 2 is a plan view;

FIG. 3 is a right side view, the left side being identical;

FIG. 4 is a back view;

FIG. 5 is a front view; and,

FIG. 6 is a bottom view. 

The ornamental design for a heavy duty storage hook, as shown and described. 